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Date: Thu, 19 Jul 2012 03:36:35 +0000 (UTC)
From: "Tsz Wo (Nicholas), SZE (JIRA)" <jira@apache.org>
To: mapreduce-issues@hadoop.apache.org
Message-ID: <782368784.74180.1342668995049.JavaMail.jiratomcat@issues-vm>
Subject: [jira] [Commented] (MAPREDUCE-4309) Make locatlity in YARN's
 container assignment and task scheduling pluggable for other deployment
 topology
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    [ https://issues.apache.org/jira/browse/MAPREDUCE-4309?page=3Dcom.atlas=
sian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=3D=
13418031#comment-13418031 ]=20

Tsz Wo (Nicholas), SZE commented on MAPREDUCE-4309:
---------------------------------------------------

Abstract Factory sounds good.

For the enum problem, let's use enum for the moment and change it to interf=
aces later.

(Sorry that I was not able to response earlier.)
               =20
> Make locatlity in YARN's container assignment and task scheduling pluggab=
le for other deployment topology
> -------------------------------------------------------------------------=
--------------------------------
>
>                 Key: MAPREDUCE-4309
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-4309
>             Project: Hadoop Map/Reduce
>          Issue Type: Bug
>    Affects Versions: 1.0.0, 2.0.0-alpha
>            Reporter: Junping Du
>            Assignee: Junping Du
>         Attachments: HADOOP-8474-ContainerAssignmentTaskScheduling-plugga=
ble.patch, MAPREDUCE-4309-v2.patch, MAPREDUCE-4309-v3.patch, MAPREDUCE-4309=
-v4.patch, MAPREDUCE-4309-v5.patch, MAPREDUCE-4309.patch
>
>
> There are several classes in YARN=E2=80=99s container assignment and task=
 scheduling algorithms that relate to data locality which were updated to g=
ive preference to running a container on other locality besides node-local =
and rack-local (like nodegroup-local). This propose to make these data stru=
cture/algorithms pluggable, like: SchedulerNode, RMNodeImpl, etc. The inner=
 class ScheduledRequests was made a package level class to it would be easi=
er to create a subclass, ScheduledRequestsWithNodeGroup.

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